Zektor ProAudio 16™ DSP Preamp Audio Matrix - Manual (Page 19)

ClarityAudio Serial Protocol, Version 1.01, 11/8/12 17
Audio Control
will fade zones 1 and 2 to the a level of 20. Regardless of their current values, zones 1 and 2 will both
reach level 20 at exactly the same time. If one zone is farther away from 20 than the other, the fade
speed will be faster, so that both zones reach the new level at the same time.
To fade to a new level using a fixed fade speed, add 20000 to the volume setting. For instance if the
ramp speed given to the VRT command is 40 (20dB per second) then:
^VZ @1,@2,20010$
will fade zones 1 and 2 to the level of 10 at a speed of 20dB per second. The zone closest to 10 will be
the first zone to reach 10.
You can cross-fade, and mix the different types of fades in a single command. For instance:
^VZ @1,10000,@2,+20040,@3,35$
will fade zone 1 to the mute level of 0, using a timed ramp. At the same time zone 2 will fade up 20dB
(40 steps) using a fixed ramp speed, and zone 3 will jump immediately to level 35.
All fades are interruptable. If you issue a new volume command while a zone is in the process of fad-
ing, it will simply begin fading to the new level from its current mid-fade setting.
‘VMIZ’ Set Zone’s Minimum Volume
Each zone has a minimum and maximum volume setting.
The maximum prevents a user from overdriving the speakers, amplifier, or even the ClarityAudio
switch.
The minimum allows you to set the volume to just below the noise level of a quiet room. The volume
setting ClarityAudio can be adjusted down to -99.5dB before muting. This is usually quite a bit beyond
the noise level of any room, or the noise level of most amplifiers. Since adjusting the volume below the
noise level is just a waste of time, the minimum level allows you to limit the volume range.
Attempting to set the volume below the minimum level will cause the ClarityAudio go into full mute
(no sound). When adjusting the volume upward from full mute, the volume will immediately jump to
the minimum level.
The level is set in 0.5dB steps.
Command format:
^VMIZ @ zone,@zone,minVol Set the minimum volume of a zone or zones.
^VMIZ @ zone,+step$ Add ‘step’ number of 0.5dB steps to current minimum.
^VMIZ @ zone,-step$ Sub ‘step’ number of 0.5dB steps from current minimum.
^VMIZ ?$ In polled mode, reads current settings of all changes.
^VMIZ @ zone,@zone,?$ Read current minimum setting(s) of given zone(s).
Response Strings:
^=VMIZ @ zone,minvol$
Where:
@ zone = One (or more) zones to be affected.
minVol = Minimum volume in 0.5dB steps with an offset of 200. Range is 0 to ‘maxVol’-99.
The gain command is given in 0.5dB steps and uses an offset of 200 to indicate a gain of 0.0dB. Values
above 200 raise gain, and values below 200 lower gain.
The minimum and maximum volume settings must have at least a 49.5dB (99 steps) difference
between them. Any attempt to set the minimum volume closer than 99 steps of the maximum, will
result in a setting of exactly 99 steps below the maximum volume setting.